That thing doesn't even look capable of stopping Flygon yet alone stronger Dragons.
Granbull has surprisingly good bulk, especially on the physical side thanks to intimidate. It actually can handle many physical dragons head on while giving them crippling paralysis or threatening them with Play Rough. Special dragons on the other hand are a different kind of beast. --- "Religion keeps pressing B when we try to evolve." - pirategeorge" [3DS FC: 1934-0673-9848 (Pentao)]
It could probably handle a few weaker ones with Intimidate using Outrage backed by that 120 attack. It's also got all the fangs and Play Rough. --- A familiar note is produced. It's the note Desolation plays to keep its instrument in tune